Inking mechanism for printing rolls



v l Dec. 20, 1938-. J. 1 BLACKLEY l *2,140,950

` Filed Feb. 6, 1937 v 2 Sheets-Sheet l i 5b l 63e if ii.

20, 1938. J. r| BLACKLEY INKING MEGHANISM FOR PRITING ROLLS 2sheets-sheet 2 Filed Feb. 6, 1937 Patented Dec. 20, 1938 UNITED STATESPATENT oFFicE 2,140,950 INKING MECHANTSM Foa PRINTING ROLLS ApplicationFebruary 6, 1937, Serial No. 124,475

4 Claims.

This invention is an improvement in ink fountains for use in connectionwith rotary newspaper webgprinting presses. The plate cylindersl of suchpresses are ordinarily adapted' to carry four-page plates in line, andeach perfecting unit is usually adapted to print webs of paper from twoto four pages wide, according to the size of the paper desired. When afull width `web is used all the plates on the plate cylinders must besupplied with ink and therefore the ink is supplied from the fountain tothe inking mechanism its full width. When a smaller paper is desired,and for example say but three plates are used on the plate i cylinder,then it is desirable to prevent ink being supplied from the ink fountainroll to that portion of the ink distributing means which wouldordinarily supply ink to the missing plate, such ink distributing meansdistributing ink taken from thefountain roll and delivering Vit to theprinting plates on the plate cylinder, which apply the ink to the paper.

The principal object of the present invention is to provide a simple andeffective means where by when less than the full number of plates isemployed on a plate cylinder the portion of ink which would be normallydirected to the omitted plate may be out off. My invention provides asimple means for cutting off this portion of the ink supply at thefountain roll.

'Io enable others to understand and use my invention I will eXp-lain thesame with reference to the embodiment thereof illustrated in theaccompanying drawings, and summarize in the claims the essentials of theinvention and novel features of construction andnovel combinations ofparts for which protection is desired.

Fig. 1 is an end elevation of an ink fountain and part of the inkdistributing means, and an embodiment of my invention applied to thefountain.

Fig.2 is an enlarged sectional view showing the ink cut off device.

Fig. 3 is a top plan view of part of the apparatus.

Fig. 4 is an enlarged detail section.

The ink fountain may be of the usual construction. As shown it comprisesa bowl I in which is journaled a fountain roll 2 from which ink may besupplied by a ductor 2a to an ink distributing drum 2b, with whichcooperates the usual ink distributing rolls 2c, from ink is supplied bysuitable rollers (not shown) to the plates on the plate cylinder; suchparts are well known and it is unnecessary to illustrate them.

The ink fountain is provided with a scraper blade indicated at 3 xedlysecured between a bar 4 secured to one side of the fountain. The innerend of the blade 3 is adjusted close to the surface of the fountain roll2, and the blade is adjustable to regulate the film of ink carried bythe fountain roll 2 to thevductor 2a. Ordinarily a series of plateadjusting screws 5 are tapped through suitableV openings in the bar 4and their lower ends engage blade 3 near the inner edge. By turningscrews 5 the space between the inner edge of the scraper blade and theperiphery of roll 2 can be very nicely adjusted. The parts thus fardescribed are common and will be readily understood.

The screws 5, when manually operated, tend to vary the distance betweenthescraper and the roll thus regulating the lrn of ink delivered fromitr to the other rolls forming the ink distributing system. All ofth'ese parts extend across the press practically the maximum width ofpaper capable of being printed.

The scraper blade 3 is ordinarily made in' one piece, but in myinvention I form the Scraper blade 3 in sections equal in number to thenumber of plates that can be carried by the plate cylinder when platedat full capacity (which in ordinary perfecting press units is four). Tothe inner side of the bar 4, and above each blade section 3, I attach aslidable bar 6 equal in length to the underlying blade section, said barbeing provided with slots 6a through which pass screws 6b, tapped intothe bar 4, that guide the bar 6 in its vertical adjustment or movement.

Each bar 6 is provided adjacent its ends and upper side with internalthreaded recesses 6c which are engaged by the threaded lower ends 1c ofrotatable rods 1, parallel with the fingers 5, and provided with areduced portion 'la which is rotatably engaged in the head 8a of a stud8 screwed into the bar 4. The rods 1 may be manually rotated to adjustthe bar 6 vertically. And for this purpose the upper ends'of rods 1 maybe shaped as desired. As shown they are provided Y with cross-apertures'ld which can be engaged by a pin to turn the rod 1.

Each bar E is normally raised out of contact with the related bladesection 3, but if it should be desired to cut ofi the ink supply at thispoint the rods 'l are turned to force the bar 6 downward and cause thelower end 6e of the bar 6 to engage the inner end of the related bladesection 3 and press the same closely against the periphery of fountainroll 2 (see Fig. 4) so as to cut off the supply of ink to the relatedpart of the ductor, and when the ink supply is so cut off, ink will notbe supplied to that portion of the plate cylinder to which a printnigplate is not attached.

As stated, the scraper blade instead of a single piece is made up ofsections, each corresponding in length to the width of a printing plate.In a four-page Wide press four blades 3 will be used, each adjustable asabove, each blade contacting with the blade next to it so when fullfour-page width of paper is printed, the scraper blades will be adjustedexactly the same as if the scraper blade was in one piece.

Rotating rods 'I in one direction will move the related bar 6 downwardforcing the blade section 3 with which the bar is associated against thefountain roll 2 so closely as will prevent ink being carried past suchblade section by the fountain roll. When ink supply is again desiredfrom such cut olf section of the fountain, the bar is drawn up out ofcontact with the scraper by revolving the rods 1 in the oppositedirection, leaving the scraper blades 3 subject to the usual adjustmentby screws 5.

I claim:

1. In combination; an ink fountain, a fountain roll, a series of scraperblade sections, and screws for adjusting the said scraper blade sectionsrelative to the fountain roll; a bar slidably mounted above each bladesection and between the fountain roll and screws; and a rod rotatablymounted adjacent each slidable bar and having a threaded end engagingwith such bar, whereby said bars may be moved into engagement with theinner edge of the related blade section to force said section to cut offthe supply of ink from that portion of the fountain roll to the inkdistributing means.

2. In combination; an ink fountain having a fountain roll, a series ofend to end scraper blade sections each corresponding in length to thewidth of a printing plate, screws for adjusting the said scraper bladesections relative to the fountain roll; a slidable slotted bar aboveeach blade section and between the fountain roll and the screws, a guideengaging the slot in the bar, a screw engaging said bar and adapted uponrotation thereof to cause it to force the edge of said section intoclose contact with the periphery of the fountain roll and cut off thesupply of ink from that portion of the fountain roll to the inkdistributing means.

3. In combination; an ink fountain having a fountain roll, a series ofend to end scraper blade sections, a bar above the blade, a series ofscrews tapped through said bar for adjusting the scraper blade sectionsrelative to the fountain roll; a short slidable bar mounted on saidfirst bar above each blade section and between the fountain roll andscrews; guides for said short bars, a screw mounted on said first barengaging each short bar whereby upon rotation thereof such bar may bemoved into or out of engagement with the inner edge of the related bladesection to cut off the supply of ink from that portion of the fountainroll to the ink distributing means related to said blade section.

4. In combination; an ink fountain having a fountain roll, a series ofend to end scraper blade sections,a bar above the blade, a series ofscrews tapped through said bar for adjusting the scraper blade sectionsrelative to the fountain roll; a short slidable bar mounted on saidiirst bar above each blade section and between the fountain roll andscrews; guides for said short bars, and a rotatable rod mounted on saidfirst bar above each short bar and having its lower end threaded andengaging a threaded socket in the adjacent short bar; whereby said shortbars may be moved into or out of engagement with the inner edge of therelated blade section to cut off the supply of ink from that portion ofthe fountain roll to the ink distributing means related to said bladesection.

JAMES L. BLACKLEY.

